// https://www.infoarena.ro/problema/evaluare
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int i=0;
string s;
int expr();
int factor();
int termen();
int constanta();
int expr() {
int r=termen();
while (s[i]=='+' || s[i]=='-') {
++i;
if (s[i-1]=='+') r += termen();
else r -= termen();
}
return r;
}
int termen() {
int r=factor();
while (s[i]=='*' || s[i]=='/') {
++i;
if (s[i-1]=='*') r *= factor();
else r /= factor();
}
return r;
}
int factor() {
int r=-1;
if (s[i]=='(') {
++i;
r = expr();
++i;
} else r = constanta();
return r;
}
int constanta() {
int r=0;
while (isdigit(s[i])) {
r = r*10+s[i]-'0';
++i;
}
return r;
}
int main() {
fin>>s;
fout<<expr();
}